I will try with some discs that my playstations cant read (for a while), but i found the problem. Some iso file on PS3ISO didn't let that my ps3 read any disc to create iso file, after delete him i could do anything i pretend, you know what i mean?
Thats very rare, i never heard of it, to be honest is hard to believe but if is true i guess it could be considered a bug
@sandungas I thinking more about distance between disc and lens which can take major factor on wearing lasers (because of different focus beam).
Well, what i said is a bit like that, the "focus" is made by moving the tiny lens closer or far away from the disc surface. That movement is made with the coil that is just a thin copper wire rolled around the tiny spherical lens
If we place the console vertically, then the disc surface is going to be vertical... and the movements of the lens are going to be "left and right"... so the gravity doesnt makes any difference when moving left or right
But with the console in horizontal the coil needs to made a bigger effort to move "up" than when moving "down"
In a healthy laser this small differences doesnt matters, but when the laser is very weared sometimes this makes the difference in between not being able to load a disc... or to load it
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Im confident this is the cause, the first time i realized about it is because i had a friend that was flipping the PS1 (upside down) to load games, LOL
I had some laughts those days with his loading methods, but yeah... it was working, and it was the kind of thing that i had a proof in my eyes that was true, later he used to do it with the PS2 too, and i have to admit eventually i did it too mostly for repair and diagnosis purposes because you know... is not serious, you are not supposed to use a laser in that state moving the console around to load the disc, lol
It could be an indication that the coil is very old (the coil had lot of overheats and is not "strong" enought to move the lens with precission)
In simple words... by moving the console around, we are helping the laser coil to do his work